Both the serials have the same female protagonist. One of the main characters is associated with the governance system. One of the main characters has a secret. There is a happy family in which the wife, husband, son, and daughter are there. It brings a storm to this happy family when the secrets of the past begin to unravel.
Both female leads are played by the same actress, and both dramas revolve around a married couple where one of them has a secret. In both dramas the couples are forced into a situation that has connections to past of one of them and in both there is a thriller case and mystery around it that pulls them into danger.
In both dramas the same actors plays lead characters. Both are thriller where the female lead has a past/family connections that is interlinked with the happenings in the drama. Apart from that the dramas are a lot different. Nonetheless, if you enjoyed the acting of the leads in Trolley, The Bequeathed will be a nice continuation.